Gravenstein D, Lampotang S, Melker R, Doviak R
Department of Anesthesiology University of Florida College of Medicine, Gaines 32610-0254, USA.
J Clin Monit Comput. 1998 May;14(4):271-4. doi: 10.1023/a:1009961728812.
We set out to establish whether a novel plastic optical fiber incorporated into an endotracheal tube (ETT) stylet could be used for intubation of a dog. A secondary objective examined the need for a direct illumination source from a laryngoscope. Lastly, the fragility of the system was tested.
An anesthetized dog was repeatedly intubated using a laryngoscope to elevate the tongue and the view of the larynx conducted through the plastic optical fiber stylet (placed within an endotracheal tube) and displayed on a television monitor. Four prototype identical stylets were tested. Repeated intubations were attempted with each stylet and graded as either successful or failed. All four stylets were tested 10 times each using a Miller 4 blade and direct illumination from the laryngoscope. Two of the four stylets were reused during an additional 10 intubation attempts using a Miller 4 blade and laryngoscope (without batteries) with only ambient light. Finally, one stylet was used for intubation after 10, 20, 30, 40 and 50 sharp 90 degree bend-and-straighten cycles using a Miller 4 blade and laryngoscope for direct illumination.
All attempted intubations were successful. However, the image quality was dramatically better when direct illumination from a laryngoscope was used than when ambient light was used. One plastic optical fiber stylet was successfully used to intubate after having been used for 20 intubations and 50 sharp 90 degree bend-and-straighten cycles. A partial lens separation occurred between the 41st and 50th bend cycle but the image remained adequate enough to successfully intubate again.
A novel plastic optical fiber incorporated into an ETT stylet can be used with a laryngoscope for intubation of a dog. Direct illumination from a laryngoscope provides a better television monitor image than when only ambient light is used. The system was durable, withstanding over 20 uses and 40 sharp bend-and-straighten cycles before a lens separation failure occurred.
我们着手确定一种集成于气管内导管（ETT）管芯的新型塑料光纤是否可用于犬的插管操作。第二个目的是研究是否需要喉镜提供直接照明源。最后，测试该系统的脆弱性。
使用喉镜反复抬起舌头，对一只麻醉的犬进行插管，通过塑料光纤管芯（置于气管内导管内）观察喉部视野，并显示在电视监视器上。测试了四个相同的原型管芯。用每个管芯反复尝试插管，并分为成功或失败。使用米勒4号刀片并借助喉镜的直接照明，对所有四个管芯各进行10次测试。四个管芯中的两个在另外10次插管尝试中重复使用，使用米勒4号刀片和喉镜（无电池），仅利用环境光。最后，使用一个管芯，在使用米勒4号刀片和喉镜进行直接照明的情况下，经过10、20、30、40和50次急剧的90度弯曲和拉直循环后进行插管。
所有尝试的插管均成功。然而，使用喉镜直接照明时的图像质量明显优于使用环境光时。一根塑料光纤管芯在用于20次插管和50次急剧的90度弯曲和拉直循环后仍成功用于插管。在第41次和第50次弯曲循环之间出现了部分镜片分离，但图像仍足够清晰，足以再次成功插管。
集成于ETT管芯的新型塑料光纤可与喉镜配合用于犬的插管。喉镜的直接照明比仅使用环境光时提供更好的电视监视器图像。该系统耐用，在镜片分离失效前可承受超过20次使用和40次急剧的弯曲和拉直循环。
